http://css-tricks.com/snippets/ Look up code snippets in CSS-Tricks: great quick resource
http://resizemybrowser.com/ Calculates browser window
http://procssor.com/ Clean up your CSS [CSS only, not HTML]
http://blogs.sitepoint.com/14-free-tools-to-validate-your-html-css-rss-feeds/ Validators
http://jigsaw.w3.org/css-validator/#validate_by_input W3 CSS validator
http://www.csszengarden.com/069/ A box fixed relative to browser or parent box [not the same as Fixed Background]
http://www.csszengarden.com/041.css Fixed background [or background-attachment: fixed]
http://csstriks.blogspot.com/2010/05/visibility-vs-display-in-css.html Difference between 'display' and 'visibility'.
http://www.rainbodesign.com/pub/css/css-visibility.html Difference between 'display' and 'visibility'.
http://www.smashingmagazine.com/2007/07/27/css-specificity-things-you-should-know/ CSS Specificity
http://www.smashingmagazine.com/2010/04/07/css-specificity-and-inheritance/ CSS Specificity and Inheritance
http://webdesignfromscratch.com/html-css/css-inheritance -cascade.php Inheritance, Cascade, Specificity
http://www.communitymx.com/content/article.cfm?page=1& cid=2795D Inheritance, Cascade Specificity [+ PROPERTIES THAT INHERIT]
http://www.smashingmagazine.com/2009/08/17/taming-advanced-css-selectors/ Taming Advanced Selectors
hhttp://www.brainjar.com/css/using/default3.asps Inheritance, Cascade Specificity
http://borderleft.com/labs/ a simple reset
http://borderleft.com/labs/media/css/html.cssThe reset code
http://net.tutsplus.com/tutorials/html-css-techniques/weekend-quick-tip-create-your-own-resetcss-file/ a simple reset
http://perishablepress.com/press/2007/10/23/a-killer-collection-of-global-css-reset-styles/ Several approaches to Reset
http://www.ejeliot.com/blog/85 more on Resets
http://meyerweb.com/eric/thoughts/2008/01/15/resetting- again/ Popular 'Reset' method, revised
http://www.crucialwebhost.com/blog/master-stylesheet-the -most-useful-css- technique/ Creating a 'Master Style Sheet' for yourself
http://sixrevisions.com/css/css-tips/css-tip-1-resetting-your-styles-with-css-reset/ What is a Reset?
http://cssglobe.com/post/1468/pure-css-animated-progress-bar CSS/JS Progress Bar [be sure to load the js]
http://skunkworks.ivanvanderbyl.com/ CSS/JS Progress Bar [be sure to load the js]
http://nicolasgallagher.com/pure-css-speech-bubbles/ Speech Bubbles
http://www.howtocreate.co.uk/tutorials/css/slopes reference for the Speech Bubbles. Using borders to produce angled shapes
http://nicolasgallagher.com/pure-css-speech-bubbles/demo/ Speech Bubbles Demo page
http://blogs.sitepoint.com/pure-css3-ribbons/ Create a 'ribbon' using CSS only
http://www.csstextwrap.com/ A text wrap tool
The three things to look for are Drag-and-drop, Geolocation, and Video/Audio
http://www.html5rocks.com/tutorials/dnd/basics/ HTML5, Drag and Drop
http://mobile.tutsplus.com/tutorials/html5/html5-geolocation/ Geolocation
http://existdissolve.com/2010/07/html5-geolocation/ Geolocation: code for accuracy
http://html5demos.com/ HTML5 demos [drag & drop, geolocation, etc.]
http://www.annodex.net/~silvia/itext/ Demos of HTML5 Video and Audio Tag Accessibility
http://praegnanz.de/html5video/index.php HTML5 videoplayer comparison
http://studio.html5rocks.com/#Columns HTML5 + CSS3 +JS for columns
http://kmsm.ca/2010/an-almost-complete-guide-to-css3-multi-column-layouts/ HTML5 + CSS3 +JS MULTI COLUMN LAYOUT
http://www.canvasdemos.com/ HTML5 Canvas demos